METRICAL EXPLOITATION OF NON-SYSTEM AERIAL PHOTOGRAPHY

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A001600010066-2
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 3
• Document Creation Date: December 28, 2016
• Document Release Date: March 1, 2000
• Sequence Number: 66
• Publication Date: September 1, 1965
• Content Type: MF

Approved For Release 2001/08/2~~~DP78B04747A001600010~d~~~}
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1 September 1965
MEMORANDKJM POR: Chairman, Photographic
Interpretation Production Board
SUBJECT:
Metrical Exploitation of
Non-System Aerial Photography '~'
1. Given any airborne camera system there are thr
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iri preparing to make metrical determinations from photography abtained
-With that camera system. These are:
a. Study the actual functioning of the camera during the
imaging process and formulate a mathematical model to describe
. its behavior.
b. Program the mathematical model in a form suitable far
"production-line" use in obtaining the desired metrical infor-
mation.
L~xtin~ed fr--:;~ autamalic
j dofrn~rCio; ~a~
I deti~sitit~ll6n
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~
un er a very
few mathematical models. Thus all flat-film plane betw~~n-the-lens shut-.
ter cameras are logically equivalent, all transverse-sweiep panoramic
cameras with IMC lens translation are equivalent, etc. All save one of
these models (i.e., flat-film plane with focal-plane shutter) have already
been programmed for production use in this Center. However, each cargera
system must be reviewed in detail to establish what model`it instances
and to verify that it is accurately represented by that model.
c. Obtain the values of the various parameters that must
be entered into the model to make it applicable to 'a particular,
frame of photography taken with the camera system .fin question.
These values can be divided into two classes:.
r
(1) values that are invariant far a given mission
(e.g., focal length; IMC cam constant); ,.
(2) values that may vary from exposure ts~?exposure
(e.g., scan rate, camera position, camera att~~ude).
P*
2. Steps a and b will be discussed together. Allipf the camera
systems now operational or proposed for operational use'~fall d
Approved. For Release 2001/
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 Approved For Release 2001/08%21:; CIA-RDP78B04747A001600010066-2
TID~TAB ~ 77/'65
SU&TECT: Metrical Exploitation of Non-System Aerial Photography
parametric values we have assumed that all military:,recori systems will
provide for the recording of data in the DoD data block format. There
are two steps in the process of utilizing such data:
3. As a premise far our discussion of ,the problem of obtaining
The first step involves the development of special film reading equipment
and this action has already been initiated by the Plans and Development
Staff. The second step will require design and implementation of a com-~
pater program by IPD.
a. Automatic transfer of the information recorded on the.
film in the data block onto a computer-readable media.
b. Computer translation of the data block information .
into a form suitable for subsequent entry into the camera
model as parametric values.
.4. In the light of the preceding discussion this. subcommittee
recommends that the Production Board approve the following actions..
b. IPD will proceed with the programming of the flat-film
plane focal-plane shutter model. Additionally, IPD will program
the translation of computer-readable images of the DoD data
block and. provide for output-from this translation in a variety-
of~forms, including human-readable listings.
,readiness.
fixed parameters (e.g., 6 inch focal length, 30? depression
angle), and where other parametric values may be obtained. In
determining the order of consideration, first priority will be
given to systems now operationally committed. Future systems
? will be studied in the order of their planned operational
a. TID will review all camera systems and publish for each
a brief description of the cemera which will include a statement
as to which model the camera exemplifies, the nominal values of
r. _ -, r,,, .,..,.
Approved For Release 2001/08/2 fi~? ~ 78B04747A001600010066-2
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? Approved. For Release 2001/08/21 :CIA-I~DP78B04747A001600010066-2
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TID/TAB - 77~~5
SUBJECT: Metrical Exp~.oitation of Non-System Aerial PYiatog`raphy
c. P&~S Will aggressively pursue the development of an
automatic data block reader that will accept e~wide range of
film formats.
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